WO2023074242A1 - 車載器及び車載器自己診断方法 - Google Patents

車載器及び車載器自己診断方法 Download PDF

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Publication number
WO2023074242A1
WO2023074242A1 PCT/JP2022/036281 JP2022036281W WO2023074242A1 WO 2023074242 A1 WO2023074242 A1 WO 2023074242A1 JP 2022036281 W JP2022036281 W JP 2022036281W WO 2023074242 A1 WO2023074242 A1 WO 2023074242A1
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WO
WIPO (PCT)
Prior art keywords
vehicle
power supply
mounted device
status
supply line
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Application number
PCT/JP2022/036281
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English (en)
French (fr)
Japanese (ja)
Inventor
清隆 谷本
文夫 小菅
俊彦 森
Original Assignee
パナソニックＩｐマネジメント株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by パナソニックＩｐマネジメント株式会社 filed Critical パナソニックＩｐマネジメント株式会社
Priority to JP2023556228A priority Critical patent/JPWO2023074242A1/ja
Publication of WO2023074242A1 publication Critical patent/WO2023074242A1/ja
Priority to US18/609,455 priority patent/US20240220346A1/en

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/0703—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation
    • G06F11/0766—Error or fault reporting or storing
    • G06F11/0769—Readable error formats, e.g. cross-platform generic formats, human understandable formats
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07B—TICKET-ISSUING APPARATUS; FARE-REGISTERING APPARATUS; FRANKING APPARATUS
    • G07B15/00—Arrangements or apparatus for collecting fares, tolls or entrance fees at one or more control points

Definitions

  • the present disclosure relates to a vehicle-mounted device and a vehicle-mounted device self-diagnosis method.
  • GNSS Global Navigation Satellite System
  • Services such as operation management and vehicle management using data from GNSS satellites are provided for vehicles equipped with such on-vehicle devices.
  • In order to receive such services it is necessary to transmit data from the vehicle side, which incurs high communication charges.
  • vehicle-mounted devices compatible with ETC 2.0 are known.
  • communication is performed with the server in normal processing, it is possible to receive the above-mentioned services by using the communication network with the server. .
  • GNSS positioning data There are various reasons why the GNSS data is missing, but the cause on the side of the ETC 2.0-compatible on-board device is that the on-board device is not always connected to the power line, and the accessory power supply ( Hereinafter, immediately after ACC) is turned on, positioning data cannot be received immediately because almanac data, ephemeris data, etc. required for measuring GNSS data (GNSS positioning data) are invalid.
  • the problem to be solved by the present disclosure is to provide a vehicle-mounted device and a vehicle-mounted device self-diagnostic method that can detect that the power supply line is not always connected in the vehicle-mounted device and notify the user to that effect. That's what it is.
  • the vehicle-mounted device is capable of receiving GNSS data in the GNSS receiver, and is connectable to both the constant power line and the ACC power line.
  • the vehicle-mounted device determines whether or not the vehicle-mounted device is always connected to the power line based on the status of the GNSS receiver and the status determination unit that determines the status of the GNSS receiver when the ACC power line is turned on. It comprises a connection state determination unit and a notification unit that notifies when the vehicle-mounted device is not always connected to the power supply line based on the determination of the connection state determination unit.
  • the vehicle-mounted device when it is determined that the constant power line is not connected to the vehicle-mounted device, a notification to that effect is sent, so that the vehicle-mounted device is aware of the fact that the constant power line is not connected and responds accordingly. and, as a result, it is possible to receive provision of services using accurate GNSS data.
  • FIG. 2 is a functional block diagram showing functions possessed by a processor; 2 is a schematic configuration block diagram of a system controller; FIG. FIG. 3 is a functional block diagram showing functions of a control processing unit; Explanatory drawing of the processing flowchart of embodiment.
  • FIG. 1 is a schematic configuration block diagram of a vehicle-mounted device according to an embodiment.
  • the vehicle-mounted device 10 includes an ETC communication antenna 11-E capable of communicating with a roadside device or the like constituting the ETC 2.0 system, a GNSS receiving antenna 11-G capable of receiving GNSS radio waves from GNSS satellites, and a vehicle-mounted A system controller 12 that controls the entire device 10, a GNSS receiver 14 that performs reception processing of GNSS radio waves received via the GNSS reception antenna 11-G to generate GNSS data and outputs it to the system controller 12, and an anode terminal is connected to the in-vehicle battery BT, the cathode terminal is connected to the constant power terminal BL1 of the GNSS receiver 14 and the constant power terminal BL2 of the system controller 12, and the backflow prevention diode D1 and the anode terminal are connected to the ACC power supply
  • the power supply can be restored without causing a reverse current as long as the ACC power supply is connected. available and operational.
  • the ETC 2.0 system provides various information useful for expressway driving (detour routes, information in the event of a disaster, etc.) by linking information between the expressway and the vehicle in real time, thereby contributing to comfortable driving for the driver. It is a system that provides an environment.
  • the ETC 2.0 system various services can be enjoyed by performing two-way communication between the roadside device called an ITS spot and the vehicle-mounted device 10 using the DSRC communication method. More specifically, it provides information mainly about highways 1000 km ahead, and provides detailed road information about the direction of travel based on the position of the vehicle on which the vehicle-mounted device 10 is mounted.
  • the GNSS receiver 14 Based on the received data output by the interface unit 14A, a processor 14B that performs various kinds of arithmetic processing to be described later and outputs positioning data (position information and time information), which is the result of the arithmetic operation, to the system controller 12, and a volatile storage unit such as a RAM. and non-volatile memory such as EEPROM, temporarily develops and processes various data including the latest position information and time information, and stores received almanac data and ephemeris data for a predetermined valid period. and a memory 14C for interim storage.
  • a processor 14B that performs various kinds of arithmetic processing to be described later and outputs positioning data (position information and time information), which is the result of the arithmetic operation, to the system controller 12, and a volatile storage unit such as a RAM. and non-volatile memory such as EEPROM, temporarily develops and processes various data including the latest position information and time information, and stores received almanac data and ephemeris
  • the ephemeris data is orbit data that indicates the exact position of the satellite used for position calculation, and is unique data used only by the satellite with the satellite number that transmitted the ephemeris data.
  • the validity period of this ephemeris data is, for example, about 4 hours in the case of GPS. In other words, the ephemeris data becomes invalid and cannot be used for processing when the validity period has elapsed since the acquisition of the ephemeris data.
  • the almanac data is data that is a simplified version of the ephemeris data, and includes simplified orbit data of all satellites currently in operation, including the satellite that transmitted the almanac data.
  • the validity period of this almanac data is, for example, about 6 days in the case of GPS. That is, when the validity period has passed since the almanac data was acquired, the almanac data becomes invalid and cannot be used for processing.
  • the almanac data is used by the GNSS receiver 14 to find available satellites in determining the current position and time.
  • FIG. 2 is a functional block diagram showing functions of a processor.
  • the processor 14B has an arithmetic processing unit 14BF1 and a status determination unit 14BF2. These functions are implemented by the processor 14B executing programs stored in the memory 14C. For example, at least part of these functions may be realized by a dedicated hardware circuit.
  • the arithmetic processing unit 14BF1 performs various kinds of arithmetic processing based on the received data output by the communication interface unit 14A, and outputs the positioning data (positional information and time information) as the arithmetic result to the system controller 12 .
  • the arithmetic processing unit 14BF1 operates on a plurality of (if possible, 4 GNSS data from three or more GNSS satellites, performs positioning processing, generates positioning data as a result of the positioning processing, and outputs the positioning data to the system controller 12 .
  • the latest time information is greatly different from the actual time, such as when the latest time information is the initial value (default value)
  • the actual position of the GNSS satellite will be greatly different, and accurate positioning will be performed quickly. It cannot be done. Therefore, it is desirable to perform processing based on more accurate time information.
  • the status determination unit 14BF2 determines the status of the GNSS receiver 14 when the ACC power line is turned on, and based on the determined status, corresponds to the case where the GNSS receiver 14 is not always connected to the power line BL. judge there is.
  • the status determination unit 14BF2 determines the status of the GNSS receiver when the power of the ACC power line is turned on.
  • the status represents the operating state of the receiver 14 and is classified into three states: cold start state (status), warm start state (status), and hot start state (status). Details will be described later.
  • FIG. 3 is a schematic configuration block diagram of the system controller.
  • the system controller 12 as shown in FIG.
  • a control processing unit 15 for controlling and processing various data
  • a user interface unit 16 for performing user interface processing
  • a display unit 17 for displaying various information under the control of the user interface unit 16, and control of the user interface unit 16
  • a sound output unit 18 that outputs various information as sound information
  • an IC card interface unit 19 that performs interface processing between the ETC card CRD, and a constant power supply line BL from the vehicle battery BT via a constant power supply terminal BL2.
  • a power supply unit 20 that supplies operating power to each unit.
  • control processing unit 15 includes an MPU 15A that controls the entire control processing unit 15, a ROM 15B that stores various data such as programs in a non-volatile manner, and a processing program that can be expanded and processing data temporarily stored. and an EEPROM 15D for storing various data in a non-volatile and rewritable manner.
  • the power supply unit 20 and the vehicle-mounted battery BT can be connected through a constant power supply line BL, and the power supply unit 20 and the ACC power supply AP can be connected through an ACC power supply line AL. Also, the power supply unit 20 and the ground GD can be connected by a ground line GL. In an actual device configuration, fuses as safety devices are provided on the constant power line BL and the ACC power line AL. In addition, the vehicle-mounted device 10 can operate even when the constant power supply line BL of the vehicle-mounted device 10 is connected to the ACC power supply line AL.
  • the GNSS receiver 14 volatilely stores the reception time data in the memory 14C backed up by receiving power supply from the constant power supply line BL each time it receives almanac data or ephemeris data from the GNSS satellites. shall be stored in
  • control processing unit 15 stores reception time data in a nonvolatile manner each time the GNSS receiver 14 receives almanac data or ephemeris data from a GNSS satellite.
  • control processing unit 15 stores the GNSS data in the EEPROM 15D or the like at the timing of predetermined conditions based on the specifications of the vehicle-mounted device.
  • FIG. 4 is a functional block diagram showing functions of a control processing unit.
  • the control processing unit 15 has an ETC processing unit 15F1, a connection state determination unit 15F2, and a notification unit 15F3. These functions are realized by the MPU 15A executing programs stored in the ROM 15B. For example, at least part of these functions may be realized by a dedicated hardware circuit.
  • the ETC processing unit 15F1 communicates with the ETC2.0 system such as the external server SV via the transmission/reception processing unit 13 and the communication antenna 11-E, and provides vehicle information to the ETC2.0 system side.
  • the servicer of the ETC2.0 system accumulates and processes data for providing various information from the ETC2.0 vehicle information collected by the external server SV, etc. , acquisition of various information such as detailed road information on the direction of travel based on the position of the vehicle in which the vehicle-mounted device 10 is mounted, and provision of various services.
  • connection state determination section 15F2 determines whether or not the vehicle-mounted device 10 is always connected to the power supply line BL.
  • the notification unit 15F3 notifies that the vehicle-mounted device 10 is not always connected to the power supply line BL based on the determination of the connection state determination unit 15F2.
  • FIG. 5 is an explanatory diagram of a processing flowchart of the embodiment.
  • the control processing unit 15 determines whether or not the ACC power supply AP is turned on and power is supplied from the ACC power supply AP via the power supply unit 20 (step S11). If it is determined in step S11 that power has not yet been supplied from the ACC power supply AP (step S11; No), a standby state is entered.
  • step S11 When it is determined in step S11 that power is supplied from the ACC power supply AP (step S11; Yes), the control processing unit 15 requests the GNSS receiver 14 to output a status. Upon receiving the request from the control processing unit 15, the status determination unit 14BF2 of the GNSS receiver 14 outputs its own status including time information to the system controller 12.
  • FIG. 1 When it is determined in step S11 that power is supplied from the ACC power supply AP (step S11; Yes), the control processing unit 15 requests the GNSS receiver 14 to output a status. Upon receiving the request from the control processing unit 15, the status determination unit 14BF2 of the GNSS receiver 14 outputs its own status including time information to the system controller 12.
  • control processing unit 15 (connection state determination unit 15F2) of the system controller 12 acquires the time information included in the status by acquiring the status from the status determination unit 14BF2 of the GNSS receiver 14 (step S12).
  • Types of status output from the GNSS receiver 14 may include the cold start state, hot start state, and warm start state, as described above.
  • both almanac data and ephemeris data are invalid. That is, in the vehicle-mounted device 10, there is no available almanac data and ephemeris data. That is, in order to use almanac data and ephemeris data, new almanac data and ephemeris data need to be acquired from GNSS satellites.
  • the warm start state is a state in which ephemeris data is invalid and only almanac data is valid. That is, in order to perform accurate positioning using GNSS data in a warm start state, it is necessary to identify GNSS satellites capable of receiving GNSS data and receive ephemeris data.
  • a hot start state is a state in which both almanac data and ephemeris data are valid. That is, in the hot start state, the vehicle-mounted device can immediately perform accurate positioning using the almanac data and the ephemeris data.
  • the invalid GNSS data state indicates that the GNSS receiver 14 is in a cold start state.
  • control processing unit 15 sets the time information (hereinafter also referred to as current time) included in the status acquired by the processor 14B (status determination unit 14BF2) to a predetermined initial value (for example, factory It is determined whether or not the factory setting value is the default value (step S13).
  • step S13 when the control processing unit 15 (connection state judgment unit 15F2) judges that the current time is the predetermined initial value (step S13; initial value), the GNSS data is not backed up. That is, it is determined that the constant power source is not connected (step S14).
  • the control processing unit 15 (notification unit 15F3) controls the control processing unit 15 (connection state determination unit 15F2) Assume that the vehicle-mounted device 10 is not always connected to the power supply line BL based on the determination of . Then, the control processing unit 15 (notification unit 15F3) notifies the user via the user interface unit 16 and the voice output unit 18 of improving the constant power supply connection by voice prompting the user to connect the constant power supply. The process ends (step S15).
  • the notification of improvement is not limited to voice, but may be displayed by light, characters, etc. on the display unit 17, or by communication via an external information device (personal computer, smartphone, etc.) via the transmission/reception processing unit.
  • an external information device personal computer, smartphone, etc.
  • the transmission/reception processing unit can be configured to
  • step S13 when the control processing unit 15 (connection state judgment unit 15F2) judges that the current time is other than the predetermined initial value (step S13; other than the initial value), the GNSS data is backed up. Since it is in the state of being connected, that is, the state in which the power supply is always connected, the process shifts to normal processing (positioning, data communication with the ETC2.0 system, etc.).
  • the control processing unit 15 (connection state determination unit 15F2) of the system controller 12 allows the vehicle-mounted device 10 to perform self-diagnosis and notify the user of the self-diagnosis result. More specifically, when the current time information is a predetermined initial value, the vehicle-mounted device 10 can detect that the constant power supply line BL is not connected and notify the user of the fact.
  • the vehicle-mounted device 10 is configured to immediately notify the user that the constant power supply line BL is not connected when the current time is a predetermined initial value. It is also possible to store the information in a renewable manner and notify the user when the information is detected a plurality of times in succession.
  • the vehicle-mounted device 10 corresponding to the ETC2.0 system has been described, but not limited to this, the vehicle-mounted device that cooperates with the GNSS system and a system similar to the ETC2.0 system is similarly described. Applicable.

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Quality & Reliability (AREA)
  • General Engineering & Computer Science (AREA)
  • Business, Economics & Management (AREA)
  • Finance (AREA)
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  • Position Fixing By Use Of Radio Waves (AREA)
PCT/JP2022/036281 2021-10-29 2022-09-28 車載器及び車載器自己診断方法 WO2023074242A1 (ja)

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JP2023556228A JPWO2023074242A1 (de) 2021-10-29 2022-09-28
US18/609,455 US20240220346A1 (en) 2021-10-29 2024-03-19 On-board device and on-board device self-diagnosis method

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JP2021-178299 2021-10-29

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002090443A (ja) * 2000-09-18 2002-03-27 Denso Corp Ｇｐｓ受信装置
JP2004118336A (ja) * 2002-09-24 2004-04-15 Clarion Co Ltd アクセス保護装置
JP2010230309A (ja) * 2007-07-30 2010-10-14 Mitsubishi Electric Corp ナビゲーションシステム
JP2016072764A (ja) * 2014-09-29 2016-05-09 矢崎総業株式会社 車両用電源ボックス装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002090443A (ja) * 2000-09-18 2002-03-27 Denso Corp Ｇｐｓ受信装置
JP2004118336A (ja) * 2002-09-24 2004-04-15 Clarion Co Ltd アクセス保護装置
JP2010230309A (ja) * 2007-07-30 2010-10-14 Mitsubishi Electric Corp ナビゲーションシステム
JP2016072764A (ja) * 2014-09-29 2016-05-09 矢崎総業株式会社 車両用電源ボックス装置

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